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#grasses

2 public questions tagged with this topic.

Plant Classification

The lodicules in grasses help in

Lodicules represent highly reduced perianth in Poaceae, generally two small fleshy scale-like structures at ovary base between lemma and palea. At anthesis they absorb water, swell turgidly within minutes and mechanically push rigid lemma away from palea, thereby opening floret for stamen exsertion and feathery stigma exposure favouring anemophily. After pollination they collapse and floret closes. They do not serve seed dispersal, embryo protection or storage, which are functions of glumes, caryopsis wall and triploid endosperm. Physiologically lodicule turgor acts as floral motor mechanism conserved across subfamilies of grasses.

Ref: Campbell Biology, Poaceae lodicules mechanism; NCERT, Grass floret opening and perianth reduction

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Terristial Biomes

Which plant group dominates the savanna biome?

“Grasses” for which plant group dominates the savanna biome. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Terrestrial biomes are distinguished primarily by long-term temperature and precipitation regimes, their seasonality, and the vegetation physiognomy those conditions support. Latitude is informative only because it often covaries with climate. The remaining alternatives—“Trees”, “Shrubs”, “Epiphytes”—refer to different states, processes, or scales and therefore do not express the same causal relationship. Plant growth form integrates water balance, fire, frost, nutrient availability, and growing-season length. Animals respond to the same filters through migration, dormancy, thermoregulation, and dietary specialization. This distinction matters because similar surface patterns can arise through different mechanisms, whereas ecological prediction depends on identifying the mechanism that actually changes rates. The cited framing is therefore most useful when treated as a conditional biological claim, with assumptions about scale and environmental context kept explicit.

Ref: Campbell Biology, Urry et al., 12th Ed., Ch. 52

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